21033223000031 has 16 divisors (see below), whose sum is σ = 23288140027008. Its totient is φ = 18835448570400.

The previous prime is 21033223000021. The next prime is 21033223000051. The reversal of 21033223000031 is 13000032233012.

It is not a de Polignac number, because 21033223000031 - 2³⁰ = 21032149258207 is a prime.

It is a super-2 number, since 2×21033223000031² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21033222999967 and 21033223000012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21033223000001) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 64118276 + ... + 64445478.

It is an arithmetic number, because the mean of its divisors is an integer number (1455508751688).

Almost surely, 2^{21033223000031} is an apocalyptic number.

21033223000031 is a deficient number, since it is larger than the sum of its proper divisors (2254917026977).

21033223000031 is a wasteful number, since it uses less digits than its factorization.

21033223000031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 414502.

The product of its (nonzero) digits is 648, while the sum is 20.

Adding to 21033223000031 its reverse (13000032233012), we get a palindrome (34033255233043).

The spelling of 21033223000031 in words is "twenty-one trillion, thirty-three billion, two hundred twenty-three million, thirty-one", and thus it is an aban number.